ompi/op: fix support of non predefined datatypes with predefined oper… #6329
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…ators ACCUMULATE, unlike REDUCE, can use with derived datatypes with predefinied operations, with some restrictions outlined in MPI-3:11.3.4. The derived datatype must be composed entierly from one predefined datatype (so you can do all the construction you want, but at the bottom, you can only use one datatype, say, MPI_INT). Refs. open-mpi#6275 Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp> (back-ported from commit open-mpi/ompi@bc1cab5)
bwbarrett
approved these changes
Feb 12, 2019
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…ators
ACCUMULATE, unlike REDUCE, can use with derived
datatypes with predefinied operations, with some
restrictions outlined in MPI-3:11.3.4. The derived
datatype must be composed entierly from one predefined
datatype (so you can do all the construction you want,
but at the bottom, you can only use one datatype, say,
MPI_INT).
Refs. #6275
Signed-off-by: Gilles Gouaillardet gilles@rist.or.jp
(back-ported from commit bc1cab5)